46G Mr. H. J. Carter on the 



Fig. 8. Rosette with multitudinous straight rays of unequal length, 

 capitate. Crateromorpha Meyeri. 



This is the rosette to which I have applied the term " pappi- 

 form," with straight capitate rays. 



Fig. 9. Rosette with many sigmoid capitate rays arranged en fleur-de-lis, 

 expanded. Farrea infitndibuliformis. 



Fig. 10. Rosette with many sigmoid capitate rays arranged en fleur-de- 

 lis, contracted helow only. Myliusia callocyathes. 



Fig. 11. Rosette with many sigmoid capitate rays arranged en fleur-de-lis. 

 Ray clavate ; head expanded laterally and dentate outwardly, 

 claw-shaped; diminished to extreme fineness just before it 

 terminates in the lower fourth, which again becoming thicker 

 joins the end of the arm of the rosette : a, upper portion of ray, 

 more magnified, dorsal view ; b, the same, lateral view. Eu- 

 plectellidce. 



Fig. 12. Rosette with multitudinous sigmoid rays of unequal length, 

 without heads, arranged en fleur-de-lis. Ray linear, subulate ; 

 upper portion thick and bent downwards and outwards at the 

 end ; diminishing below into extreme fineness just before it 

 terminates in the lower fourth, which again becoming thicker 

 joins the end of the arm of the rosette. Rossella velata, Wy. 

 Thomson. 



N.B. The extreme fineness to which the ray is reduced at 

 the point mentioned often leads to its being broken off in the 

 two rosettes last described, whereby it is seen lying about the 

 "field" in the forms of 11 b and 15a respectively, while the 

 lower extremities still remain attached to the arm of the rosette, 

 as at 15 d. 



Fig. 13. Rosette with rays once branched, capitate. An occasional form. 

 Dactylocalyx subglobusa. a, echinated head of ray ; an occasional 

 form of the head in fig. 6, from the same sponge. 



Fig. 14. Rosette with straight capitate rays spined laterally. Euplectella 

 aspergillum (fragment dredged up by H.M.S. ' Porcupine '). 



Fig. 15. Rosette; more magnified view of one arm of fig. 12 : a, detached 

 ray, broken oft' at the fine portion ; b, conically inflated and 

 tubercled end of arm ; c, apical straight spine of the same ; d, end 

 of arm, showing the way in which the lower extremities of the 

 rays still remain attached to the tubercles on the inflation after 

 the upper portions (a) have been broken off. 



Fig. 1G. Rosette ; more magnified view of one arm of fig. 8 : a, rays, of 

 unequal length ; b, conically inflated and tubercled end of arm; 

 c, end of arm, showing the way in which the straight rays are 

 respectively based on a tubercle. 



Fig. 17. Rosette with elongated shaft-like axis and straight capitate ray9. 

 Aphrocallistes Bocagei. 



Fig. 18. Rosette with elongated axis and pointed rays. Aphrocallistes 

 Bocagei. 



N.B. The last two forms are rather sparsely mixed up with 

 the globular forms figs. 6 & 7 in Aphrocallistes Bocagei. 



Fig. 19. Rosette with elongated axis and straight pointed rays, often 

 capitate. Aphrocallistes beatrix. 



Fig. 20. Long-spined shaft peculiar to Aphrocallistes beatrix. 



This and the foregoing form are mixed up together in A. 

 beatrix without the forms 6 & 7, which are only found in A. 

 Bocagei. They bear the relation in size represented in the 

 figures ( 19 & 20) ; but 20 is much more plentiful than 19. Thus, 

 while the forms G & 7 appear to pass into 17 & 18 in A. Bocagei, 



